delete-s3-bucket-parallel.js

let aws = require('aws-sdk');

let bucket = '<BUCKET TO DELETE>';

let deleted = 0;

setInterval(function() {
  console.log("Deleted: " + deleted);
}, 1000);

let deleteFrom = async function(s3, prefix) {
  let token = undefined;
  while (true) {
    let result = await s3.listObjectsV2({
      Bucket: bucket,
      ContinuationToken: token,
      FetchOwner: false,
      Prefix: prefix,
    }).promise();
    token = result.NextContinuationToken;
    if (result.Contents.length === 0 && !token) {
      console.log("Finished: " + prefix);
      break;
    }

    await s3.deleteObjects({
      Bucket: bucket,
      Delete: {
        Objects: result.Contents.map(e => { return {Key: e.Key}; }),
      },
    });
 
    deleted += result.Contents.length;   
  }
};

(async () => {

  let s3 = new aws.S3({region: 'us-west-2'});
  
  let letters = []; // We assume all keys start with a-zA-Z0-9_- (otherwise run normal delete afterwards)
  for(var i=65; i<=90; i++) {
    letters.push(String.fromCharCode(i));
    letters.push(String.fromCharCode(i).toLowerCase());
  }
  letters.push('-');
  letters.push('_');
   for(var i=0; i<=9; i++) {
    letters.push('' + i);
  }

  console.log("deleting with " + letters.length + " parallel requests");
  await Promise.all(letters.map(l => deleteFrom(s3, l)));
  console.log("done deleting all - run again to be sure some may have failed");


})().catch(err => console.log(err));